Can we put imaginary names for the people we are writing a message to if their name hasn't been given - English - Message Writing

Question

Can we put imaginary names for the people we are writing a
message to if their name hasn't been given?

Nidhi Kol · Accepted Answer

You can write any name if the name of the person is not given in
the question

Can we put imaginary names for the people we are writing a message to if their name hasn't been given?